Clear, obvious (6)
I believe the answer is:
patent
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">clear</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >'<span class="explanation-format__original">obvious</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ ></span>
(Other definitions for patent that I've seen before include "licence inside" , "glaring" , "Open the right to an invention" , "This leather has a glossy varnished surface" , "Registration of an invention or trade name" .)